New Mine Sapphire Syndicate Records, 1889-1967

This series contains documentation on the governance and history of the company. It includes corporate histories written within and without the company, founding documents (articles of incorporation, resolutions), and some minutes of Board of Directors meetings, mostly from the earliest years of the company.

This series contains incoming and outgoing correspondence from the company.

This series contains the company's financial records, including those related to taxes, stockholders, unemployment compensation, operating statements, general ledgers, check stubs, ledgers, and journals. There are also some of Thomas Sidwell's personal financial materials.

This series contains court papers related to a 1956-1960 case, Gadsden vs. New Mine Sapphire Syndicate. At issue were Gadsden's assets after her husband, Charles T. Gadsden (a New Sapphire manager of many years) died in 1954.

This series contains legal documents, including deeds, patents, and materials related to the company's mining claims.

This series consists of one folder of reports produced or commissioned by the New Mine Sapphire Syndicate. Most relate to mining claims.

This series consists of two folders of maps and blueprints related to the operations of the New Mine Sapphire Syndicate. Some relate to mining claims, and others are unidentified.

This series contains newspaper and magazine clippings, mostly from Montana publications, about the Yogo sapphires.

This series contains printed and other publicity materials produced by and for the company.

This series contains photographs of the New Mine Sapphire Syndicate operation in Utica, Montana. Most were taken around 1924-1925, and show the buildings, mechanicals, and other aspects of the mine site and mining equipment. Several images show damage after floods.